Maintaining a Local Reference Scale for Electrical Impedance by Means of a Digital Impedance Bridge

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F21%3AN0000024" target="_blank" >RIV/00177016:_____/21:N0000024 - isvavai.cz</a>

Výsledek na webu

<a href="https://ncsli.org/store/viewproduct.aspx?id=19681629" target="_blank" >https://ncsli.org/store/viewproduct.aspx?id=19681629</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.51843/measure.13.4.7" target="_blank" >10.51843/measure.13.4.7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Maintaining a Local Reference Scale for Electrical Impedance by Means of a Digital Impedance Bridge

Popis výsledku v původním jazyce

Electrical impedance is one of the most commonly measured electrical quantities and there is a wi...de variety of impedance meters commercially available. Electrical calibration laboratories usually use sets of artifact impedance standards to calibrate these meters. The traceability chain for electrical impedance is described with a particular emphasis on the use of impedance bridges to calibrate the impedance standards themselves. Up to now, coaxial transformer ratio bridges have been used for this purpose, but these have a number of practical disadvantages. It is shown that digital impedance bridges, which use digital techniques to provide the accurate voltage ratios for bridge balancing, offer a viable alternative to transformer ratio bridges. The principles of operation of source-based and sampling-based impedance bridges are described. The joint research project VersICaL: A versatile electrical impedance calibration laboratory based on digital impedance bridges (2018-2021) has shown that digital impedance bridges provide, even for a laboratory with limited resources and expertise, a practical means of calibrating impedance standards at the parts per million level of accuracy. A source-based digital impedance bridge, designed and constructed within the project, is described and some measurement results presented.

Název v anglickém jazyce

Maintaining a Local Reference Scale for Electrical Impedance by Means of a Digital Impedance Bridge

Popis výsledku anglicky

Electrical impedance is one of the most commonly measured electrical quantities and there is a wi...de variety of impedance meters commercially available. Electrical calibration laboratories usually use sets of artifact impedance standards to calibrate these meters. The traceability chain for electrical impedance is described with a particular emphasis on the use of impedance bridges to calibrate the impedance standards themselves. Up to now, coaxial transformer ratio bridges have been used for this purpose, but these have a number of practical disadvantages. It is shown that digital impedance bridges, which use digital techniques to provide the accurate voltage ratios for bridge balancing, offer a viable alternative to transformer ratio bridges. The principles of operation of source-based and sampling-based impedance bridges are described. The joint research project VersICaL: A versatile electrical impedance calibration laboratory based on digital impedance bridges (2018-2021) has shown that digital impedance bridges provide, even for a laboratory with limited resources and expertise, a practical means of calibrating impedance standards at the parts per million level of accuracy. A source-based digital impedance bridge, designed and constructed within the project, is described and some measurement results presented.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/8B18014" target="_blank" >8B18014: A versatile electrical impedance calibration laboratory based on digital impedance bridges</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NCSLI Measure: The Journal of Measurement Science

ISSN

1931-5775

e-ISSN

2381-0580

Svazek periodika

13

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—